The photograph is an image that shows differences in fields of vision.
See the content of design below for a more detailed description of the design.
The newly-developed "Non-linear Progressive Power Change (smoothing design)" enables expansion of the field of vision around the fitting point(※1).
The Non-linear Progressive Power Change (smoothing design) enables long-distance vision 1.5 times greater than that of the previous indoor lens "Roomiest" and a field of vision at least 10% wider.
With ordinary progressive lenses, a common semi-finished blank(※) is used at each base curve division, resulting in differences in optical performance.
Semi-finished lens material with shaping on one side completed, leaving the other side to be processed when an order is placed.
Indoor LD provides a wider field of vision and comfortable fit to customers needing all kinds of power with no difference in optical performance caused by power.
Significant differences in the powers of the right and left lenses produce differences in the base curves, adversely affecting appearance.
In cases where there is a significant difference between the base curves, the curves of Indoor LD are automatically matched to adjust the appearance at the same time as realizing outstanding optical performance.
Flexible Prism Thinning is carried out to achieve greater thinness and lightness of edged lenses to frame shapes.
The prism volume of Indoor LD is set by each additional power with the balance between appearance and optical performance. The prismatic volume of the left and right lenses are automatically matched.
In this case, the prismatic volume is matched to the smaller value.
Clearer astigmatic field of vision.
Optimum aspheric correction is achieved using elements such as power, close work distance, base curve and the lens tilt angle in line with "Listing's Law" that determines the orientation of the eyeball when the field of vision shifts in upward, downward, left, right and diagonal directions.
Astigmatic field of vision wider by approximately 25%*
This is an image of S-6.00. SEIKO's previous lens used 1.50 monomer.
The numerical value that indicates the ability of the lens material to refract light is called the "refractive index" and the higher this index, the thinner the lens. Indoor LD features a lineup of 2 types of material: Ultra-high 1.74 refractive index material and 1.60 material. In addition, back surface aspheric design is used to achieve a thin lens. The synergy between material and design enables a lens that is thinner and lighter than previous lenses.
|Product Name||Thinness||UV Cut off||Reflection Resistance||Contamination Resistance||Scratch Resistance||Anti-static Resistance||Reducing blue light||Blocking UV rays reflected from the back||Fogging Resistance|
|Indoor LD 1.67||★★★★|
|Indoor LD 1.60||★★★|
S：Standard specifications OP：Option
|Product Name||Refractive Index||Specific Gravity||Abbe Value||Progressive Power Corridor (mm)||Quality Assurance Mark|
|Indoor LD 1.67||1.67||1.36||32||23|
|Indoor LD 1.60||1.60||1.30||42||23|